CONDUCTIVE DEVICE FOR COLD CATHODE FLUORESCENT LAMP
A conductive device for electrically connecting to a conductive element of at least one cold cathode fluorescent lamp (CCFL) includes at least one coupling terminal and at least one extended conductive segment. The coupling terminal is in the form of an elongated column structure and provided with an insertion bore for receiving the conductive element of the CCFL therein. The extended conductive segment is provided along outer and inner longitudinal edges with a plurality of spaced pairs of upward projected conductive clips. The conductive clips in each pair can hold one coupling terminal therein while the conductive element of the CCFL is received in the insertion bore of the coupling terminal, so that the CCFL conductive device is associated with the CCFL. When a high voltage is applied to the CCFL via the conductive device, discharge occurs in the CCFL to emit light.
The present invention relates to a conductive device, and more particularly to a conductive device for cold cathode fluorescent lamp (CCFL).
BACKGROUND OF THE INVENTIONIn the past few years, the display panel employing the principle of cathode ray tube (CRT) has been largely replaced by the liquid crystal display (LCD). The LCD has many advantages compared to the conventional CRT display panel, including reduced volume and weight, reduced power consumption, free of radiation pollution, etc. The LCD has been widely applied to a variety of products, from small-size information products, such as the LCD screens for personal digital assistants (PDAs), notebook computers, desktop computers, etc. to large-size electronic products, such as LCD televisions.
The LCD includes a display unit, a backlight module located behind the display unit, and an enclosure having a frame. The display unit includes a display panel, a circuit board for processing data signals, and a supporting tape carrier package (TCP). The backlight module includes a cold cathode fluorescent lamp (CCFL), a light-guide plate, a light-diffusion plate, and a light reflection plate.
The CCFL in the backlight module is provided at two opposite ends with a lamp lead wire each to serve as external electrodes. When a high-frequency voltage is applied from a high-frequency power supplying device to the lamp lead wires at two ends of the CCFL, discharge occurs inside the CCFL to release ultraviolet ray, which excites fluorescent powder coated on an internal wall surface of the CCFL to emit light, enabling the CCFL to serve as the light source of the backlight module.
Conventionally, complicated procedures are involved in connecting the lamp lead wires of the CCFL to cables. First, a small length of the plastic sheath at a free end of each of the cables is stripped off to expose the conductive wires in the cable. Then, the bared conductive wires are manually or mechanically twisted. The twisted conductive wires are then curled into a small loop, which is tinned to increase the hardness of the conductive wires. The conductive wires of the cables are then extended through a receiving hole formed on a holder and welded to the lamp lead wires of the CCFL. Finally, the conductive wires are pulled backward to thereby move the lamp lead wires of the CCFL into the receiving hole on the holder.
To enable firm and stable welding of the conductive wires to each of the lamp lead wires of the CCFL when the lamp lead wire of the CCFL is connected to the conductive wires of the cable in the above-described procedures, a sufficient length of the plastic sheath at the free end of the cable must be stripped to expose a long enough length of the conductive wires. And, the conductive wires of the cable must be manually or mechanically twisted and tinned before they are extended through the receiving hole on the holder to be wound around and welded to the lamp lead wire of the CCFL. The above connecting procedures are troublesome and time-consuming to waste a lot of labor. Moreover, the conductive wires of the cables are disorderly arranged to increase the difficulty in assembling and future maintaining the CCFL.
SUMMARY OF THE INVENTIONIt is therefore a primary object of the present invention to provide a modularized conductive device for CCFL, so that a CCFL can be more easily installed in a backlight module to simplify the assembly and reduce the manufacturing cost of the LCD.
To achieve the above and other objects, the conductive device for CCFL according to the present invention includes at least one coupling terminal and at least one extended conductive segment. The coupling terminal is in the form of an elongated column and provided with an insertion bore for receiving a conductive element of a CCFL therein. The conductive element of the CCFL can be a lamp lead wire or a conductive cap. The extended conductive segment is provided along outer and inner longitudinal edges with a plurality of spaced pairs of upward projected conductive clips. The conductive clips in each pair can hold one coupling terminal therein while the conductive element of the CCFL is received in the insertion bore of the coupling terminal, so that the CCFL conductive device is associated with the CCFL. Therefore, when a power is supplied to the CCFL via the conductive device, discharge occurs inside the CCFL to emit light.
In another preferred embodiment of the present invention, the extended conductive segment is provided along an inner longitudinal edge with a plurality of spaced and sidewardly projected portions, and an upward extended joint pin is provided on each of the sidewardly projected portions. And, the CCFL conductive device further includes at least one holding unit. The holding unit includes a holding portion for holding one coupling terminal therein while the coupling terminal is associated with the conductive element of the CCFL. The holding portion is internally provided with a through hole for engaging with the joint pin, so that the joint pin is in electrical contact with the conductive element of the CCFL.
With the technical means adopted by the present invention, the conductive element of the CCFL can be easily associated with the CCFL conductive device. Then, when a high-frequency voltage is applied from a high-frequency power supply to the CCFL via the conductive device of the present invention, discharge occurs in the CCFL, enabling the CCFL to serve as a light source of a backlight module. The CCFL conductive device of the present invention is a modularized product to eliminate the drawback of disordered arrangement of conductive wires as found in the conventional way of assembling the CCFL to cables. Therefore, the backlight module for the LCD can be assembled more easily to save a lot of labor and time and accordingly, reduce the manufacturing cost of the LCD.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
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As shown, the CCFL conductive device 100 further includes at least one extended conductive segment 3. The extended conductive segment 3 is provided along an outer and inner longitudinal edges 31a, 31b thereof with a plurality of spaced pairs of conductive clips 32. The conductive clips 32 included in each pair are correspondingly and oppositely located at and upward extended from the two longitudinal edges 31a, 31b of the conductive segment 3 for clamping one coupling terminal 1 therein, so that the CCFL conductive device 100 is associated with the CCFL 2. It would be apparent to a person skilled in the art that two and more CCFLs 2 can also be associated with the CCFL conductive device 100 of the present invention in the above-described manner. In addition, the CCFL conductive device 100 can be connected to an inverter, so that a predetermined amount of working current can be input via the inverter to flow through the extended conductive segment 3 to the CCFL 2, enabling the CCFL 2 to electrically connect to a power supply and emit fluorescent light for use as a light source of illumination.
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The present invention has been described with some preferred embodiments thereof and it is understood that many changes and modifications in the described embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Claims
1. A cold cathode fluorescent lamp conductive device for electrically connecting to a conducting element of at least one cold cathode fluorescent lamp, comprising:
- at least one coupling terminal being provided with an insertion bore for the conductive element of the cold cathode fluorescent lamp to insert thereinto; and
- at least one extended conductive segment being provided at predetermined positions with a plurality of spaced pairs of upward extended conductive clips; the conductive clips included in each pair being corresponding to each other for clamping one coupling terminal therein.
2. The cold cathode fluorescent lamp conductive device as claimed in claim 1, wherein the coupling terminal is in the form of an elongated column structure.
3. The cold cathode fluorescent lamp conductive device as claimed in claim 1, wherein the conductive element of the CCFL is a lamp lead wire.
4. The cold cathode fluorescent lamp conductive device as claimed in claim 1, wherein the conductive element of the CCFL is a conductive cap.
5. A cold cathode fluorescent lamp conductive device for electrically connecting to a conducting element of at least one cold cathode fluorescent lamp, comprising:
- at least one coupling terminal being provided with an insertion bore for the conductive element of the cold cathode fluorescent lamp to insert thereinto;
- at least an extended conductive segment being provided at predetermined positions with a plurality of spaced and sidewardly projected portions, and each of the sidewardly projected portions being provided with an upward extended joint pin; and
- at least one holding unit having a holding portion for receiving one coupling terminal therein; the holding portion being internally provided with a through hole for engaging with the joint pin upward extended from the sideward projected portion, so that the joint pin is in electrical contact with the conductive element of the cold cathode fluorescent lamp being inserted into the coupling terminal.
6. The cold cathode fluorescent lamp conductive device as claimed in claim 5, wherein the holding portion of the holding unit is in the form of a concaved recess.
7. The cold cathode fluorescent lamp conductive device as claimed in claim 5, wherein the holding portion of the holding unit is in the form of a sleeve for receiving the coupling terminal therein.
8. The cold cathode fluorescent lamp conductive device as claimed in claim 5, wherein the coupling terminal is in the form of an elongated column structure.
9. The cold cathode fluorescent lamp conductive device as claimed in claim 5, wherein the conductive element of the cold cathode fluorescent lamp is a lamp lead wire.
10. The cold cathode fluorescent lamp conductive device as claimed in claim 5, wherein the conductive element of the cold cathode fluorescent lamp is a conductive cap.
Type: Application
Filed: Jan 8, 2009
Publication Date: Mar 25, 2010
Inventors: Chen-Hsuan Hsieh (Hukou Township), De-Hong Chen (Hukou Shiang), Chih-Chung Chen (Taipei City)
Application Number: 12/318,777
International Classification: H01R 33/02 (20060101);